US Iron
HWA®
High quality, high specific gravity dense aggregate — eco-responsibly manufactured from natural Magnetite in the United States of America.
US Iron HWA®
US Iron HWA®, used mainly as loose ballast or as aggregate for high density concrete, is a high quality, high specific gravity, and dense aggregate, eco-responsibly manufactured from natural Magnetite in the United States of America.
US Iron, LLC
US Iron, LLC supplies HWA® from owned Magnetite resources, ensuring long-term availability and consistent quality. Available throughout the U.S. so there are no hurdles for you to overcome with product ordering and delivery.
US Iron — we are the miners, not a broker, of our products. It is our owned resource.
US Iron HWA® Product Uses
US Iron HWA® as an aggregate for heavy concrete
When you need heavy concrete with densities of up to 325 lbs. pcf, you can certainly use US Iron HWA®. The high density concrete can be produced and placed using standard equipment.
US Iron HWA® loose ballast applications
With its high density US Iron HWA® is often used as loose ballast. Typical applications are:
- Offshore platforms
- Windmill foundation
- Bridges
- Tanks (movable oil & gas)
Special applications for US Iron HWA®
Besides the above mentioned applications, there are numerous niche applications for US Iron HWA®. US Iron, LLC supports innovation, partnering with universities to identify new products and applications that can benefit from the unique properties of US Iron HWA® and contribute to old mining communities with eco-responsible manufacturing of waste products.
US Iron HWA® Properties
| Property | Value | Unit |
|---|---|---|
| Fe Content | 62.0–72.9 | % |
| Fe₃O₄ Content | 86–99 | % |
| Specific Gravity | 4.6–5.3 | t/m³ |
| Bulk Density | 2–5.3 | t/m³ |
| Particle Density Range | 4.6–5.3 | t/m³ |
| Concrete Density Range | 200–325 | lbs. pcf |
US Iron HWA® complies with requirements for aggregates to be used in concrete. Particle density range: 4.6–5.3 t/m³. Concrete density range: 200–325 lbs. pcf.
Compliance: US Iron HWA® meets the requirements for heavy aggregates used in high-density concrete per applicable ASTM and ACI standards.
Eco-Responsible: Manufactured from natural Magnetite at owned U.S. mine locations. Non-toxic, recyclable after use, and harmless to the environment.
Packaging & Delivery
We can deliver US Iron HWA® in bulk or bags by Ship, Barge, Container, Train, or Individual truckload. We have three U.S. mines with storage facilities to supply you on-time and economically, all year-round, throughout the U.S.
Mineral Origin
US Iron HWA® is manufactured from the natural mineral Magnetite which is mined in our own group resources. As the miners — not brokers — we control quality from extraction to delivery.
Toxicology & Safety
The product is harmless to the environment, non-toxic in all its forms and sustainable materials. It can be recyclable after use — making it one of the most environmentally responsible heavy aggregates available.
Contact Us
Please contact us for detailed data on a single grade or further information on our US Iron HWA® product range. Call or email to discuss your needs for your next project.